Underbody lamp



FIG. 1 is a perspective view of an underbody lamp showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is an enlarged left view thereof; with the right view being a mirror image thereof; and,

FIG. 5 is a top view thereof; with the bottom view being a mirror image thereof.

The broken lines shown on the drawings depict portions of the underbody lamp that form no part of the claimed design. 

CLAIM The ornamental design for an underbody lamp, as shown and described. 